Yes, batterystatus can do alerts.. my batterystatus keeps tabs on voicemail, SMS, Email, Tasks, and calendar, all on a 1 line plugin..
There is a HTC home "clone" floating around for batterystatus.. Its notification line is very similar to mine...
Here are some pics of mine.. Let me know if you want it, and I'll try to figure out how to zip it up and send it off to you. You'll need VJdialer to make the Voicemail check work, but it's a simple setup.
